android 监听Home键和亮灭屏

原创于 2016-01-06 10:03:37 发布 · 1.4k 阅读

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本文详细介绍了如何在Android应用中注册并监听系统广播，如Home键按下、屏幕关闭等事件，并通过接收这些广播来实现应用状态的相应变化，包括切换Tab、检查是否解锁等操作。

1.注册广播

        IntentFilter filter = new IntentFilter();
        filter.addAction(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);//home键
        //filter.addAction(Intent.ACTION_USER_PRESENT);//用户解锁广播
        filter.addAction(Intent.ACTION_SCREEN_OFF);//灭屏广播，亮屏为on
        registerReceiver(mReceiver, filter);

2.接受广播

    private static final String SYSTEM_DIALOG_REASON_KEY = "reason";
    private static final String SYSTEM_DIALOG_REASON_HOME_KEY = "homekey";
    BroadcastReceiver mReceiver = new BroadcastReceiver() {

        @Override
        public void onReceive(Context arg0, Intent intent) {
            String action = intent.getAction();
            if(Util.EXIT_ACTION.equals(action)){
                mTabHost.setCurrentTab(0);
                mRadio_mylock.setChecked(true);
            }else if(Intent.ACTION_CLOSE_SYSTEM_DIALOGS.equals(action)){
                String reason = intent.getStringExtra(SYSTEM_DIALOG_REASON_KEY);
                if (SYSTEM_DIALOG_REASON_HOME_KEY.equals(reason)) {
                    // 短按Home键
                }
            }else if(Intent.ACTION_SCREEN_OFF.equals(action)){  
                //灭屏    
            }

        }
    };